ImpactAlpha, April 18 – XpertSea, the Quebec City-based startup, has developed a sensing device that helps fish farms and hatcheries keep track of their stock. Aquaculture accounts for half of the seafood consumed around the world and one-third of fish production jobs. But fish farms suffer financial losses and waste from overfeeding and overcrowding, low survival rates and escapes. XpertSea says its devices, which use computer vision and machine learning, are being used in 48 countries and have counted and tracked more than 17 billion organisms.